Fortra Email Security & Anti-Phishing vs Kaseya 365 Advanced Threat Protection: Side-by-Side Comparison (2026)

Short answer

Mid-market and enterprise security teams drowning in phishing and BEC attacks will see immediate ROI from Fortra Email Security & Anti-Phishing because its DMARC enforcement and account takeover detection actually stop the attacks that make it past your initial filters. The platform covers five of the five NIST CSF 2.0 Protect and Detect functions, with particular strength in continuous monitoring and identity controls that catch lateral movement after compromise. Skip this if your organization needs a single unified email and web gateway; Fortra is email-focused and doesn't pretend otherwise. Mid-market and enterprise security teams defending SaaS and email environments will find real value in Kaseya 365 Advanced Threat Protection's AI-driven user behavior analytics, which catches account compromise and insider threats that signature-based tools routinely miss. The platform's strength in continuous monitoring and anomaly detection maps directly to NIST DE.CM and DE.AE, though its automated remediation is narrower than full incident response orchestration. Skip this if you're looking for a unified platform covering network detection, endpoints, and cloud workloads; Kaseya 365 ATP deliberately focuses on email and SaaS, which means tighter detection but less architectural flexibility.